Security

Local security, cryptography, password, and token utilities.

281 ready-to-use tools

Security

10 tools

JWT DecoderDecode JWT headers and payloads locally and inspect time claims. Decoding does not verify the token signature.

Password GeneratorGenerate passwords with browser cryptographic randomness. Choose length and character sets, then copy the generated passwords.

HMAC CalculatorCalculate an HMAC for a message and key using SHA-256, SHA-384, or SHA-512 locally in your browser.

AES-GCM Text EncryptionEncrypt or decrypt text with a passphrase using AES-GCM, a random salt, and locally derived key material.

PBKDF2 Key DerivationDerive key bytes from a password, salt, iteration count, and selected hash algorithm using PBKDF2.

HKDF Key DerivationExpand input key material using a salt and context information with the HKDF key derivation function.

CRC-32 Checksum CalculatorCalculate the CRC-32 checksum of text and display its hexadecimal value for error-detection comparisons.

Adler-32 Checksum CalculatorCalculate the Adler-32 checksum of text and inspect the hexadecimal checksum value.

TOTP Generator and CheckerGenerate and check time-based one-time passwords from a Base32 secret using RFC 6238 settings.

RSA-OAEP Key Pair GeneratorGenerate an RSA-OAEP public and private key pair in your browser and export the keys as PEM text.